install gulp to process code

node_modules/collect-stream/build.js

@@ -0,0 +1,32 @@
+'use strict';
+
+Object.defineProperty(exports, '__esModule', {
+  value: true
+});
+exports['default'] = collect;
+
+function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { 'default': obj }; }
+
+var _concatStream = require('concat-stream');
+
+var _concatStream2 = _interopRequireDefault(_concatStream);
+
+var _once = require('once');
+
+var _once2 = _interopRequireDefault(_once);
+
+function collect(stream, opts, fn) {
+  if (typeof opts === 'function') {
+    fn = opts;
+    opts = {};
+  }
+  fn = (0, _once2['default'])(fn);
+  stream.on('error', fn);
+  stream.pipe((0, _concatStream2['default'])(opts, function (data) {
+    fn(null, data);
+  }));
+}
+
+;
+module.exports = exports['default'];
+